Porto Judeu, on Terceira Island, is one of the clearest Jewish-related toponyms in the Azores. The name is old enough to have survived into the formal ecclesiastical designation Porto Judeu de Santo António, which shows that the Jewish marker remained in use even after being absorbed into a Christian framework. The local church was built before 1470, which confirms the antiquity of the settlement. Porto Judeu briefly received the status of vila by royal charter on 12 February 1502, only to lose it again in 1503.

What cannot be stated with the same confidence is the exact origin of the name. The available sources do not prove the existence of a documented medieval Jewish quarter or a stable Jewish community there. Porto Judeu should therefore be read as a toponymic case: the hard fact is the persistence of the name, not a fully demonstrable institutional Jewish presence.